The pensioner, who has three "great kids and four great grandchildren", is blind in one eye and uses a wheelie walker for mobility, but isn't ruling out travelling around Australia with her new fortune.

The woman said she could scarcely believe the win was real and had even more trouble convincing her daughter.

"When I told her I don't think she believed me," she said.

"When the reality hit, I didn't have the ticket to show her because I'd given it to the staff for safe keeping.

"Then we cried and we laughed, we cried and we laughed.

"And she said to me 'what a tale to tell the grandchildren'."

The winner spent just $2 on the winning ticket, which was a Kwikpik with randomly selected numbers.

The winning numbers were 5, 6, 22, 23, 36, 37, 56, 74, 75 and 77.

Keno spokesman Nick Quinn congratulated the winner, saying everyone at Keno was excited to hear that Queensland's fifth millionaire for 2015 was going to enjoy her win so much.

"We love to make millionaires and we love to hear stories like this one," Mr Quinn said.

"As our winner pointed out, Keno can change your life, no matter what stage of life you are at."